Strap Sizing Guide

This post will show you three very simple ways of measuring the lug width on your watch. Normally it is the lug width which will determined the width of the strap needed for your watch.


You can simply hold a ruler up against the watch and measure the gap as shown in the image above. This watch has a lug width of 2cm or more commonly referred to in mm. So in this case, you will need a 20mm width watch strap.

Digital Callipers

If you have some digital callipers then they are a great tool to use. They will accurately measure the gap between the lugs. This is the most accurate form of measurement out of the three we have suggested.

WatchObsession Lug and Strap measuring tool

We offer a tool which comes in handy frequently. As you can see here you can use the tool to measure the lug width. You can also use this tool to measure a strap by feeding the strap through the allocated gap. It is a very quick and effective tool.

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  • Gilli pettinger: August 01, 2018

    Do you stick 13mm thread through watchstraps?

  • WatchObsession: August 04, 2016

    Hi Ian, have you seen the Hirsch Pure – ?

    It comes in an XL length.


  • Ian Marlow: July 22, 2016

    Do you have any rubber straps that have the ‘clasp side’ length around 10-11cm, rather than the almost universal 8cm length they all appear to have? Having a large wrist, an 8cm clasp side length puts the clasp towards the side of my wrist – which is uncomfortable and impractical. Thanks.

  • Barry surtees: June 24, 2016

    Hi, do your leather straps come in different lengths?
    I purchased a strap recently and I have to use the last hole, I’ve seen a couple of others but need to know if they are available longer, thks

  • WatchObsession: January 13, 2015

    Hi Joe,

    Typically yes, but to be sure you can use one of the methods shown in this blog post to accurately measure the lug width.



  • Joe: January 13, 2015

    Hi WatchObsession,

    Our Rolex lug widths typically 20mm? I have a Datejust and a Daytona.


  • WatchObsession: March 03, 2014

    Hi Dimitris,

    Traditionally when a Watch Strap is measured, the measuring points are normally the very ends of the strap. To measure the usable length of a strap you will need to measure to the hole where the buckle will go in to and allow a few mm’s either way.


  • Dimitris: February 27, 2014

    Hello! What about the length measure? Which are the start/end points to measure the length of the strap?

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